Israel's apparent strike on Iran after days of vacillation was small and appeared calibrated to dial back risks of a major war, even if the sheer fact it happened at all shattered a taboo of direct attacks that Tehran broke days earlier.

Prime Minister Benjamin Netanyahu's war Cabinet had initially approved plans for a strike on Monday night inside Iranian territory to respond forcefully to last Saturday's missile and drones from Iran, but held back at the last-minute, three sources with knowledge of the situation said.

By then, the sources said, the three voting members of the war Cabinet had already ruled out the most drastic response — a strike on strategic sites, including Iran's nuclear facilities whose destruction would almost certainly provoke a wider regional conflict.